Steam hammee



' UN TED STATE PATENT QF I E.

JEAN B'EOHE, JR, OF HUOKESWAGEN, GERMANY.

STEAM-HAMMER.

SPECIFICATION forming part of Letters Patent No. 514,69 4, dated February 13, 1894. Application filed May 22, 1893. Serial No. 475,090. (No model.)

To all whom it may concern.-

Be it known that I, JEAN BECHE, J r., of Hiickeswageu, near Elberfeld,'in the Empire of Germany, have invented new and useful Improvements in Steam Machine-Hammers, of which the following is a specification, reference being bad thereinto the accompanying drawings. 7

According to this invention the hammer head of a steamhammer is connected to the piston of its actuating steam cylinder by means of-a flexible connection such as a belt, cord or chain passing over fixed and traveling sheaves, the raising of the head being effected .by steam pressure in such cylinder while its release or fall is'due to the exhaust of such steam from the cylinder.

The invention further relates" to a means [of actuating the steam supply and exhaust valve of such apparatus. I

In the drawings hereto annexed: Figure 1 is a side elevation partly in section, of a steam hammer constructed according to this inven tion, showing the position of the parts when the hammer head is in its raised position. Fig. 2 shows the position of the parts after the head has fallen. Fig. 3 is a section through or a: Fig. 1. Fig. 4 is a section through y y Fig. 1.

Upon reference to the drawings it will be seen that a, is the hammer head, I) the steam piston, c the steam cylinder, (1 the steam port, a

and e and f the exhaust ports thereof.

q is a tappet lever, terminating in a toothed sector m by which the steam supply and exhaust valve sis operated.

h is the steam supply pipe.

qlis the fixed sheave, and 'r the traveling sheave, over which the cord, band or chain j is led. The piston rod 1) of the cylinder 0 is of tubular form, and within it works the secondary piston rod .2 connected at its upper end by means of a pin joint to the traveling sheave 4, while on its lower end is formed the head It contained within a casing is on the lower side of the piston. The rod 2 is free to open, so that atmospheric pressure is at all times acting upon the lower surfaceof the piston b. r

The automatic devices for actuating the steam supply and exhaust valve s, consist of the vertical rod to working in guides formed upon the cylinder and provided with the roller twhich engages with the tappet lever g before mentioned. The rod wis raised and depressed by the arm n which projects from the upper extremity of the piston rod 19', which alternately engages with the collars o n on the. rod to as the piston rod rises and falls. One end of the flexible connection j is made fast to an eyebolt provided in the roof or upper framework of the forge While the other end is carried under the sheave r and over the sheave 't', journaled in said framework, and attached to the head a.

In operation, the valve s beingin the position shown in Fig. 2, steam from the pipe his 'admittedto the upper surface of the piston b by the port (1, and the piston 19 and sheave 'r are forced downward. By this action the head a of the hammer is raised by the cord j to the position shown in Fig. 1. As thepiston rod 1) descends, the arm n comes in contact with the collar '0 and depresses the rod-w, by which action the roller 25 engages with the tappet lever q, Whose sector m then raises the spindle of the valve 8 and closes the steam port d, see Fig. 1. Communication is now opened by the valve 8 between the upper surface of, the piston and the exhaust f through the port e, and the hammer head a is released and allowed to descend. As the head descends upon the forging under treatment, the sheave 'r is raised by the cord 7', the arm 12 engages with the upper collar 12 of the rod to which in turn causes the roller 25 to come in contact with the tappet lever q, the valve sis depressed and steam again admitted to the upper surface of the piston b, and the cycle of operations is completed. When the piston 19 has risen to the level of the part 6, the valve 8 being in the position shown in Fig. 1, aportion of steam at atmospheric pressure is compressedin the cylinder above such port 6, and forms an efiective cushion against the rebound of the piston, alike effect for the downtoo ward stroke of the piston being aflorded by the elastic washer g provided in the base of the cylinder.

It will be understood that instead of the operation of the valve 3 being edected automatically as above described, it may be accomplished by hand.

By connecting a steam hammer head with the piston of its actuating cylinder by means of a flexible connection, as above described, a greater travel is obtained for the head with a comparatively small stroke steam piston, whereby the velocity of the head is increased without the speed of the piston becoming excessive, and the working of such apparatusis thereby rendered more economical.

In place of single fixed and traveling sheaves being employed, multiple sheaves may be substituted when desired.

What I claim, and desire to secure by Letters Patent of the United States, is

1. In asteam hammer the combination with the hammer head, of a steam cylinder and piston, a flexible connection connecting said hammer head with a stationary support, and passing over a fixed sheave, said piston having a movable sheave for engaging said flexible connection between the stationary support and said fixed sheave, a valve for controlling said cylinder, a valve controlling rod operatively connected with said valve, and a part connected with said piston engaging projections on said valve controlling rod for operating said valve at each end of the stroke of said piston, substantially as described.

2. In asteam hammer, the combination with the hammer head, the steam cylinder and piston, of a flexible connection extending from the hammer head over a fixed sheave to a stationary support, a movable sheave connected with said piston engaging said flexible connection between the fixed sheave and said stationary support, a controlling valve for said cylinder, a valve controlling rod provided with projections in position to be engaged by a part connected with said piston, a tappet lever provided with arms for engaginga part secured to the valve controlling rod, said tappet lever having a toothed sector for engaging a part connected with said valve, substantially as described.

3. In a steam hammer the combination with the hammer head, of a piston and steam cylinder having an inlet port and an exhaust port adapted to be closed by the piston before reaching the end of its back stroke, a flexible connection extending from the hammer head, over a fixed sheave to a stationary support, a controlling valve for said inlet and exhaust ports, and controlling devices for said valve operated by said piston for closing said inlet port, and opening said exhaust port at the end of the down stroke of the piston, whereby the back stroke of the piston will close said exhaust port and form a steam cushion between the piston and the end of the cylinder, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

JEAN BEOI-IE, JUNIOR.

Witnesses:

WM. ESSENWEIN, RUDOLPH FRICKE. 

